EFFINGHAM STP
NPDES ID: IL0028622
E — SNC: Effluent violation (monthly average limit)
The facility discharged more of a pollutant than its permit allows, based on a monthly average.
This quarter: 1 effluent violation.
Violations
April 30, 2026
Zinc, total [as Zn]
11% over limit
Discharged 0.061 mg/L against a permitted limit of 0.055 mg/L (MO AVG)
DMR, Limited - Numeric Violation
March 31, 2026
pH
0% over limit
Discharged 5.5 SU against a permitted limit of 6 SU (MINIMUM)
DMR, Limited - Numeric Violation
Coliform, fecal general
6150% over limit
Discharged 25000 MPN/100mL against a permitted limit of 400 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
February 28, 2026
Zinc, total [as Zn]
58% over limit
Discharged 0.087 mg/L against a permitted limit of 0.055 mg/L (MO AVG)
DMR, Limited - Numeric Violation
January 31, 2026
Zinc, total [as Zn]
38% over limit
Discharged 0.076 mg/L against a permitted limit of 0.055 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Iron, dissolved [as Fe]
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
First flagged
April 14, 2026 (5 months ago)
Last confirmed
September 15, 2026 (6 days ago)